Collapsible core for vehicle tires.



V P.'& B. DE MATTIA.

COLLARSIBLE CORE FOR VEHlCLE TIRES.

vAPPLICATION FILED JAN. 15, I914- Patenteul Apr. 13, 1 915.

mum/103s.

WITNESSES PETER DE MATTIA AND BARTI-ICLD DE MATTIA, OF GARFIELD, NEW JERSEY.

CCLLAPSIBLE CORE FOR VEHICLE-TIRES.

mantra,

To all air/mm 1'15 may concern Be it known that we, PETER DE MATTIA and Ban'rnonn DE MATTIA, citizens'of the United States, and residents of Garfield, in the county of Bergen and State of New Jersey, have inventeda new and Improved Collapsible Core for Vehicle-Tires, of which the following is a full, clear, and exact deseription.

Our invention relates to collapsible cores for use in manufacture of tire shoes.

The object thereof is to provide a simple, strong and inexpensive device which can be easily and quickly assembled or demounted, which core on its'inner periphery presents a single annular member, thereby increasing the resistance of the core to the spreading action taking place at the inner periphery of the core when the same is used for vulcamzlng purposes.

We attain the above object by providing I I n a single core formed of core segments and.

adapted to be received by a single annular memben and secured thereto by suitable means adapted to draw said segments to said annular member and toward the axis of said annular member.

'The invention consists of the construction and combination of parts to be more fully described hereinafter and fully set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which like characters indicate corresponding parts in both views and in which: a

Figure 1. is an elevation of a core embodying our invention; and Fig. 2 is a section on line 2*2, Fig. 1. Referring to the drawings, 3, 4, 5 and 6 "represent the four segments or sections forming the circular core. The contacting ends of the parts 4 5 and 5 6 are directed radially, while the contacting ends of the parts 3 4t and. 3 6 converge outwardly toward the outer periphery of the core, so that the segment 3 can. be easily removed toward the center of the core, thereby permitting collapsing the core, as is customary for such cores.

Each of the segments on the inner periphery is provided with a flanged portion 7 on the margin of which a lateral projection 8 is formed, said flanged portion 7 of each section, with the lateral projection 8,

forming together a continuous annular Specification of Letters Patent.

the annular member.

the engagement of the cylindrical surface 9" Patented Apr. 113, 1915.

Application filed January 15, 1914. Serial No. 812,342.

flange and a continuous lateral projection on one side of said core. The inner lateral surface of each ofthe segments is beveled, as shown at 9 in Fig; 2, with a portion 9 of said inner periphery remaining cylindrical. The purpose of this will appear hereinafter.

The segments or sections'of the core are bound together by means of a single annular member 10 provided with an annular recess 11 on one side of the outer peripherythereof. The recess 11 has a cylindrical portion 12 parallel tothe axis of said an nular member adapted to be engaged by thecylindrical portion 9 of the projection 8. The portion 13 of the recess normal to the aXisof said member and, therefore, at-

right angles to the portion 12 of said recess is adapted to be engaged by the sides 14 of the flanges 7 of said segments. recess has also a beveled or ,angularly disposed bottom 15 connecting the parts 9 and 12 of the recess 11 and substantially parallel to the bevel 9 of the segments. Each of the segments is secured to the annular member by means of bolts -16, which bolts are carr the sections, as shown in Fig. 1, so that each section is secured by means of two bolts to the single ring or annular member 10. The

action of each of-said bolts is to draw its section into the recess 11 and toward the axis of said annular member. The drawing action of said bolts on said sections therefore 18 toward the annularmember and angularly toward the axis of said member.

The diam'eter of the cylindrical portion 12 of the recess 11 is such as to bring the ends of said segments of the core together at the same time as their cylindrical porti0n'9' comes in contact with thesaid portion 12 of Simultaneously with and 12, the surface 13 pf the recess 11 comes in contact with the sides 14 of the segments, thus The said the inner parts of the segments are wedged in the recess ll. of the annular member by the bolts 16. The cylindrical part 20 of the annular member, lying to one side of the flange 7, forms on said flange a lateral projection similar to the projection 8 on the op posite side of said flange. The purpose of this is to form on each side of the section a support for the casing; and this not forming a part of this invention is not illustrated.

The V-shaped groove 21 is provided on the innervperiphery of the annular member for engagement by the spreader such annular member will otter a greater resistance,'being a unit in itself, that is, a single member, than in the ordinary cores at present in use in which the spreader engages the segments of the core directly.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. In a collapsible core for vehicle tires, a

circular core member formed of segments,

each of said segments having on the inner periphery thereof a lateral projection, said projections of said segments forming together an annular lateral projection on said circular core member, each of said segments having on the inner periphery of said projections a beveled'surface; a single annular member having an annular recess on the outer periphery thereof at one side of said member, said recess having a beveled bottom therein adapted to co-act with the beveled surface of said segments; and locking means -arried by said annular member for securing said segments to said annular member, said locking means being disposed at substantially right angles to the beveled bottom of said recess of said annular member whereby they draw said segments into said recess an- ,gularly and toward the axis of said annular member.

2. In a collapsible core for vehicle tires, a circular core member formed of segments, each of said segments having a lateral projection at the inner periphery thereof, said segments with the projections thereon forming together an annular llange portion with the lateral projection on said circular core member, each of said segments at the lateral projection having at its inner periphery a beveled surface; a single annular member having an annular recess at one of its outer edges, said recess having a beveled bottom and the sides of said recess being adapted to engage the inner periphery of the lateral projection of each of said segments and a portion of a side of each of said flanges of said segments; bolts carried by said annular member, the threaded end of said bolts projecting into said recess of said annular member substantially at right angles to the bereled bottom of said recess, said segments having threaded openings in the lateral projection adapted to be engaged by the threaded ends of said bolts, whereby said segments are wedged in said recess of said annular member by the drawing action of said bolts on said segments, said drawing action being angular and toward the axis oi the annular member, substantially as and for the purpose set forth.

3. In a collapsible core for tires, a circular core formed of arcuated segments, each segment having a bevel surface at the inner periphery, an annular member forming a support for said segments, and bolts mounted to rotate in said annular member and engaging said segments at the bevel side and at right angles to said side, said annular member. having means adapted to guide each of the segments normally to the axis of the core and parallel thereto.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

PETER DE MATTIA. BARTHOLD DE- MATTIA. Witnesses:

ISAAC W'I-n'rn, ELEANOR L. MAHONY. 

